c++ - Returning and using a pointer to a multidimensional array of another class -

i'm trying access 'room' array via functions in room class itself, i.e:

 class ship{      room * rooms[3][4];  public:     room ** getrooms(){         return *rooms;    }   }   class room{    //variables...   ship * ship_ptr;   public:      getshipptr(); //assume returns pointer class ship      void function_x(){     this->getshipptr()->getrooms()->rooms[x][y]->dothat();       }   } 

i'm doing wrong pointer-wise i'm not sure, correct code can access room array out of ship class? note: assume rooms initiated

i'm doing wrong pointer-wise i'm not sure

you making false assumption 2d array can decay pointer pointer 1d array can decay pointer.

int arr1[10]; int* ptr1 = arr1; // ok. 1d array decays pointer.  int arr2[10][20]; int** ptr2 = arr2; // not ok. 2d array not decay pointer pointer.  int (*ptr2)[20] = arr2; // ok. ptr2 pointer "an array of 20" objects. 

my suggestion:

simplify code , change interface to:

room* getroom(size_t i, size_t j){    // add checks make sure , j within bounds.    return rooms[i][j]; }